NDLI: Resource allocation for multiple input multiple output-orthogonal frequency division multiplexing -based space division multiple access systems

Content Provider	IET Digital Library
Author	Pao, Wei Chen Lou, Wen Ting Chen, Yung Fang Chang, Dah Chung
Abstract	The problem of the system throughput maximisation and the fairness issue among users is considered for the downlink multiuser multiple input multiple output-orthogonal frequency division multiplexing system with MMSE precoding. Since finding the optimal solution by using the exhaustive search has very high computational burden, the authors propose a low-complexity user selection strategy plus the optimal power allocation in this study. With resorting to the mathematical simplification process, the proposed user selection scheme is designed to compare the related value of SINR. The power allocation is performed after the user selection. However, the power allocation is not in interference-free environment but in the presence of crosstalk, which is a nonlinear non-convex optimisation problem. In this study, the authors use an optimisation technique to obtain the optimal solution of the constrained non-convex nonlinear problem by replacing the objective function with a difference of two convex functions. A bisection-based strategy to solve this problem with interference-awareness to find local optimal solutions is presented in this study. Simulation results show that the performance of the proposed algorithm is close to that of the optimal solution. The trade-off between the system throughput and the fairness among users is also considered.
Starting Page	3424
Ending Page	3434
Page Count	11
ISSN	17518628
Volume Number	8
e-ISSN	17518636
Issue Number	Issue 18, Dec (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/8/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0104
Journal	IET Communications
Publisher Date	2014-12-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bisection-based Strategy Concave Programming Constrained Nonconvex Nonlinear Problem Crosstalk Exhaustive Search Fairness Issue among Interference-awareness Interpolation And Function Approximation Least Mean Squares Method Low-complexity User Selection Strategy MIMO Communication MMSE Precoding Modulation And Coding Method Multiple Access Communication Multiple Input Multiple Output-orthogonal Frequency Division Multiplexing System Multiuser Channel Nonlinear Nonconvex Optimisation Problem Nonlinear Programming Numerical Analysis OFDM Modulation Optimal Power Allocation Optimisation Technique Radio Link And Equipment Resource Allocation Space Division Multiple Access Space Division Multiple Access System System Throughput Maximisation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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